Cyrus was seen sporting a noticeable diamond ring on her finger at Muhammad Ali's Celebrity Fight Night XVIII on Saturday.

But alas, those hoping for a Cyrus-Hemsworth wedding will be disappointed: Although reps for the two stars haven't commented, People magazine cites an anonymous source close to the pair who says they're not engaged.

But that hasn't kept the actress/singer from showing off the huge sparkler.

She tweeted an image of herself wearing it on Thursday, writing "I am soooo obsessed with @jennahipp nail foundations! It looks so chic and classic!" underneath the pic.

Cyrus and Hemsworth - who, of course, had an epic weekend as “Hunger Games” posted the third-best opening weekend ever with $155 million - have been dating off and on for the past three years.

They met on the set of the 2009 romantic flick “The Last Song,” only to break up the following year. They got back together less than a year later.

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I'm sorry for my controversial, judgmental, and offensive remarks. I am only speaking from which I believe. I just wanted to rile up some feathers because I just got fired from 7-11 and the taxi cab company I was working at.

Excuse me please. My husband very intelligent man, do not disrespect him, that is not a rocket in his pocket and he is not glad to see you. If you please, know what I mean. Don't disrespect the wise one.

@ Arabic symbols person: Humm, so now whether your civilization is truly advanced and wise is determined by whether you, as a man, CONTROL, your wife and daughter? WOW! When will men all around the world realize that their TRUE manhood is not in their control over other people. It's in whether you can get others to CHOOSE to do what you want them to, not controlling their decisions. It takes a stronger man to get a woman to agree with him and do what he wants than it does to make her do things he wants. Will you all every learn? If so, then your civilization will be the truly advanced one.

I can't beleve how low the West has sunk. Your women parade aboot like village whøres. This is why you're civilzation is in decline. Only when Islam has blanketed the earth will true purty exist. Now if you'll excuse me I must clense myself after staining my eyes with this harlots sham.

your inability to accept progress in a civilization is what holds you back to the dark ages. You evidently cannot control your basic animalistic urges, so you demonize the natural attraction. Grow up and learn to control yourself.

@Charlie Brown,
This is the kind of respons Id expect from someone usingthat name. You're lesbian friend will always pull the ball away befor you kick it. That ball repressents the wisdom and piety of Islam. I hope in tim you'll realize you're ignorance and repent.

Please don't lecture anyone on morals. We know as far as the West goes morals have declined drastically. What I CAN say is that your culture is no better. Women are also to be treated with respect as well... your society does as much degrading of women and children as ours, though it is done through different means.